What rude things do you hate that Sims do.

Another thing players can do if all your sims get on your pcs or just watch tv or get into your fridge - is turn the items around backwards. For some weird reason sims cannot turn a device back around to use it - even though they have no issue turning items to repair them. It's always cracked me up to see this - but makes it an easy way to make your sims do as you want them to do and keep visiting sims from using your stuff without locking doors or storing the items.

I keep my kid sims doing homework by turning pcs and tvs to face walls. When I have a sim bake a birthday cake for aging up later - I keep other sims from eating it by putting in the fridge and turning the fridge to face the wall.